Fill In The Blanks[1 Marks ]

Question 11 Mark

Relation between linear velocity and angular velocity of a body moving in circular path is _______.

Answer

Relation between linear velocity and angular velocity of a body moving in circular path is $\vec{\text{v}}=\vec{\omega}\times\vec{\text{r}}.$

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Question 21 Mark

Value of $\vec{\text{A}}\times\vec{\text{A}}$ is ______.

Answer

Value of $\vec{\text{A}}\times\vec{\text{A}}$ is zero.

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Question 31 Mark

$\vec{\text{A}}\times\vec{\text{B}}=\vec{\text{A}}.\vec{\text{B}},$ the angle between $\vec{\text{A}}$ and $\vec{\text{B}}$ is $\theta=$______.

Answer

$\vec{\text{A}}\times\vec{\text{B}}=\vec{\text{A}}.\vec{\text{B}},$ the angle between $\vec{\text{A}}$ and $\vec{\text{B}}$ is $\theta=45^\circ.$

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Question 41 Mark

The necessary condition for a physical quantity to be a vector is that it must obey ________.

Answer

The necessary condition for a physical quantity to be a vector is that it must obey law of vector addition.

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Question 51 Mark

Resultant of two same vector physical quantity perpendicular to each other ________.

Answer

Resultant of two same vector physical quantity perpendicular to each other $\sqrt{\text{A}^2+\text{B}^2}.$

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Question 61 Mark

Equation for time of flight of a projectile fired at an angle $\theta$ with the horizontal is ________.

Answer

Equation for time of flight of a projectile fired at an angle $\theta$ with the horizontal is $\text{T}=\frac{2\text{u}\sin\theta}{\text{g}}.$

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Question 71 Mark

$\vec{\text{C}}=\vec{\text{A}}\times\vec{\text{B}},$ direction of $\vec{\text{C}}$ is _______.

Answer

$\vec{\text{C}}=\vec{\text{A}}\times\vec{\text{B}},$ direction of $\vec{\text{C}}$ is perpendicular to plane of $\vec{\text{A}}$ and $\vec{\text{B}}.$

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Question 81 Mark

Magnitude of the vector product of two vectors is equal to area of the _______ formed by vectors as adjacent sides.

Answer

Magnitude of the vector product of two vectors is equal to area of the parallelogram formed by vectors as adjacent sides.

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Question 91 Mark

Vectors which are mutually perpendicular are known as _______.

Answer

Vectors which are mutually perpendicular are known as orthogonal vectors.

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Question 101 Mark

In uniform circular motion, acceleration of object is directed toward ______.

Answer

In uniform circular motion, acceleration of object is directed toward centre of circular path.

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Question 111 Mark

Horizontal range of a projectile is same for angle of projection $\theta$ and _______.

Answer

Horizontal range of a projectile is same for angle of projection $\theta$ and $90^\circ-\theta$ (complementary angle).

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Question 121 Mark

Centripetal acceleration associated with a body in uniform circular motion is _______.

Answer

Centripetal acceleration associated with a body in uniform circular motion is $\frac{\text{mv}^2}{\text{r}}.$

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Question 131 Mark

A vector which have zero magnitude and arbitrary direction is known as ______.

Answer

A vector which have zero magnitude and arbitrary direction is known as null vector.

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Physics Fill In The Blanks[1 Marks ]

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